InChI=1S/C19H26O9/c1-10(2)17(25)26-9-19(3,11-7-5-4-6-8-11)28-18-14(22)12(20)13(21)15(27-18)16(23)24/h4-8,10,12-15,18,20-22H,9H2,1-3H3,(H,23,24)